This is a Magpul Industries Stock known as the Zhukov-S, model MAG585-PLM.
The Magpul Zhukov-S Stock is a no-compromise folding stock for the modern AK. The Zhukov-S Stock casts aside traditional AK stock shortcomings and offers a folding" collapsible stock with QD sling mounts" modular Cheek Risers" and a shock-absorbing rubber butt-pad for superior traction. The Zhukov-S has right-side folding for compatibility with side-mounted optics. Designed to fit most common stamped AK receivers without modification via a unique wedge block" the durable injection molded polymer Zhukov-S Stock redefines the human interface with the AK platform. Made in U.S.A. Stock counts as one US compliance part for 922(r).
Features:
5-Position length of pull adjustability
Adjustment lever is unobtrusive and anti-snag
Solid steel hinge pin
High strength lock mechanism